/********************************************************************************************
 ***   FILE: virtual_destructor.cpp
 ***   DATE: 03/02/2004
 *** AUTHOR: Daniel Dementiev
 ***   GOAL: This is an example program for IST482 class. It illustrates the difference
 ***         between a virtual destructor and usual one.
 ***         Instructior:
 ***          1. compile the program using MS C++ command line compiler:
 ***             ...> cl virtual_destructor.cpp /EHsc
 ***          2. run the program and notice the output
 ***          3. in line 26 comment the keyword virtual and recompile the program
 ***          4. run it and compare the outputs
 ********************************************************************************************/

#include <iostream>
#include <string>

using namespace std;

class Person {
   protected:
      string name;
   public:
      Person() : name("unknown") { cout<<"Creating object Person\n"; };
      Person(char *n) : name(n) { cout<<"Creating object Person\n"; };
      virtual ~Person() { cout<<"Destroying object Person\n"; };
      virtual void Print() const { cout<<"Person::Print(): "<<name; };
      virtual void PrintAll() const {};
};

class Student : public Person {
   private:
      float gpa;
   public:
      Student() : gpa(0) { cout<<"Creating object Student\n"; };
      Student(char *name, float GPA) : Person(name), gpa(GPA) { cout<<"Creating object Student\n"; };
      ~Student() {  cout<<"Destroying object Student\n";  };
      void Print() const { cout<<"Student::Print(): "<<gpa; };
      void PrintAll() const { cout<<"Student::PrintAll(): "; Person::Print(); cout<<": "<<gpa; };
};


void main()
{
	Person *person = new Student("Bob Tester", 3.90);
	cout<<endl;
	delete person; // destroy the object
}

/********************************************************************************************/